<template>
	<view>
		<!-- 使用自定义的搜索组件 -->
		<!-- <my-search :bgcolor="'black'"></my-search> -->
		
		<my-search @click="gotoSearch"></my-search>
		
		
		<view class="scroll-view-container">
			<!-- 左侧的滑动区 -->
			<scroll-view class="left-scrool-view" scroll-y="true" :style="{height: wh + 'px'}">
				<block v-for="(item,i) in cateList" :key="i">
				<view :class="['left-scroll-view-item',i===active?'active':'']" @click="activeChanged(i)">{{item.cat_name}}</view>
				</block>
			</scroll-view>
			<!-- 右侧的滑动区 -->
			<scroll-view scroll-y="true" :style="{height: wh + 'px'}" :scroll-top="scrollTop">
				<view class="cate-1v2" v-for="(item2,i2) in cateLevel2" :key="i2">
					<!-- 二级分类的标题 -->
				<view class=".cate-lv2-title">/ {{item2.cat_name}} /</view>	
				<!-- 当前二级分类下的三级分类列表 -->
				<view class="cate-lv3-list">
					<!-- 三级分类的item项 -->
					<view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
						<!-- 三级分类的图片 -->
						<image :src="item3.cat_icon"></image>
						<!-- 三级分类的文本 -->
						<text>{{item3.cat_name}}</text>
					</view>
				</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	import badgeMix from '@/mixins/tabbar-badge.js'
	export default {
		mixins: [badgeMix],
		data() {
			return {
				//当前设备可用的高度
				wh: 0,
				cateList:[],
				active:0,
				//二级分类的列表
				cateLevel2:[],
				scrollTop:0
			};
		},
		onLoad() {
			const sysInfo = uni.getSystemInfoSync()
			this.wh = sysInfo.windowHeight
			
			this.getCateList()
		},
		methods:{
			//获取分类列表的数据
			 async getCateList() {
			    // 发起请求
			    const { data: res } = await uni.$http.get('/api/public/v1/categories')
			    // 判断是否获取失败
			    if (res.meta.status !== 200) return uni.$showMsg()
			    this.cateList = res.message
				
				
				//为二级分类赋值
				this.cateLevel2=res.message[0].children
			},
			activeChanged(i){
				this.active=i
				
				//重新为二级分类赋值
				this.cateLevel2=this.cateList[i].children
				
				this.scrollTop=this.scrollTop===0?1:0
			},
			//跳转商品列表页面
			gotoGoodsList(item3){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?cid='+ item3.cat_id
				})
			},
			gotoSearch(){
				uni.navigateTo({
					url:'/subpkg/search/search'
				})
			}
		}
	}
</script>

<style lang="scss">
	.scroll-view-container {
		display: flex;

		.left-scrool-view {
			width: 120px;

		.left-scroll-view-item {
			background-color: #f7f7f7;
			line-height: 60px;
			text-align: center;
			font-size: 12px;
			
			&.active{
				background-color: #ffffff;
				position: relative;
				
				&::before{
					content: '';
					display: block;
					width: 3px;
					height: 30px;
					background-color: #c00;
					position: absolute;
					top: 50%;
					left: 0;
					transform: translateY(-50%);
				}
			}
			}
		}
	}
	.cate-lv2-title {
	  font-size: 12px;
	  font-weight: bold;
	  text-align: center;
	  padding: 15px 0;
	}
	.cate-lv3-list {
	  display: flex;
	  flex-wrap: wrap;
	
	  .cate-lv3-item {
	    width: 33.33%;
	    margin-bottom: 10px;
	    display: flex;
	    flex-direction: column;
	    align-items: center;
	
	    image {
	      width: 60px;
	      height: 60px;
	    }
	
	    text {
	      font-size: 12px;
	    }
	  }
	}
</style>